This series is a prelude to the relationship between Sakisasa and Hatori, their ups and downs. What sets this series apart is the fact that each scene is shown twice--once from the girl's point of view and then the guy's.
Title: Kiss, Zekkou, Kiss (Prequel)

Continuation of Kiss, Zekkou, Kiss, a shoujo manga following the relationship between Sakisaka and Hatori--the ups and downs, misunderstandings, the tears and the laughter.
A unique thing about this series is that each story/situation is told twice--once from the girl's perspective, and once from the guy's perspective! The reader ends up learning what each side was thinking.